9 ER":2yvkp16d said:
I like our president, but he is too slow to help. Why wait until after the hurricane to get organized to help? We knew it was coming and we knew the damage it was going to do. We knew people were going to stay and try to ride it out. We watched it in the gulf for three days on TV.
I live 30 miles from Galveston and I'm not sure if I would have left my home and animals. My wife would have had to threaten to divorce me or cut me off to get me to leave. All you people that are upset that people stayed need to ask yourself what would you have done if your place was close to the coast.
The coverage of the aftermath is similar to the war. All that is being shown and talked about is the bad stuff. For every stupidass acting a fool there are hundreds that had no choice and need help. What about the kids or elderly? What choice did they have? We were not prepared.
Yeah stay sounds smart, if that tidal surge had came in at Galveston the storm surge be devastating I have seen Carla first hand you can not imagine in your wildest dreams the destruction. That was in 1961 when most of Galveston to Houston was rice and cattle farming, now its one mass of humanity.
Storm surge model for your back yard.
http://www.chron.com/content/chronicle/ ... index.html
http://www.chron.com/cs/CDA/ssistory.mp ... an/3049031
20-foot wall of water in the Galveston
More devastation would be caused by winds blowing over the Gulf of Mexico and pushing surface water inland -- creating up to a 20-foot storm surge. Such a wall of water would swamp most development near Galveston Bay, including Texas City, Kemah and Johnson Space Center. Varying levels of water would flood much of the area between Sam Houston Parkway and the bay.
On Galveston Island, the seawall could hold back much of the storm surge, but at some point the water would creep onto the island from the bay side. The island's highest point is just 22 feet above sea level.
Much like a river becomes deeper and more turbulent when it narrows, a storm surge also can increase in height and intensity when its source of water narrows. Dodson said this has profound implications for the Port of Houston. Some models ended with a 30-foot wall of water in the Ship Channel near the port's turning basin, he said. "It would be huge," he said. "It could overwhelm chemical storage facilities, water treatment plants and other sensitive areas."
The port's severe-weather plan calls for most cargo ships to exit the facility and weather the storm at sea in preparation for the possibility of flooded buildings.
Wave modeling
Another, perhaps even-now-unanticipated effect is large waves accompanying the storm surge.
A waves expert at Texas A&M University at Galveston, Vijay Panchang, said he and colleagues were surprised when they observed wave data associated with Hurricane Ivan shortly before it slammed into Alabama last September.
A wave-measuring buoy about 60 miles south of Dauphin Island, before it snapped, registered an average wave height of about 50 feet, Panchang said. That means the biggest waves were a staggering 100 feet tall. Such wave heights, according to his modeling, should only occur every 300 years or so.
Either Ivan's waves were a freak event, or hurricane forecasters may need to adjust their wave expectations for large storms in the warm Gulf waters.
"This is from a storm that hit only a few hundred miles to the east of us," he said. "There's nothing to say that another storm won't create really big waves for us."
These large waves caused by Ivan may have been as responsible, if not more so, than the storm surge for severely damaging the I-10 bridge bear Pensacola, Fla., Panchang said.
Surprises after landfall
Engineers and forecasters say the most unpredictable element of a storm comes after landfall, when it either dumps rain and floods creeks and bayous or moves quickly enough that relatively little rain falls.
Tropical Storm Allison probably isn't a good model for what to expect. The system was so poorly organized and slow moving that some hurricane forecasters say it wasn't a tropical storm. In some areas of the city, enough rain fell to classify Allison as a 10,000-year rainfall event. Still, because a large hurricane's storm surge likely would block the flow of bayou waters into Galveston Bay, any significant rainfall could back up into inland streets and homes quickly, Dodson said.
The last major hurricane most Houston residents remember was Alicia, which made landfall on the west end of Galveston Island in August 1983.
Unfortunately, planners say, as devastating as that storm was, it's a poor predictor of what to expect from a larger, Category 4 or bigger storm.
Alicia's highest sustained winds on land were measured at 96 mph. Most of the Greater Houston area received just 5 inches of rain. Storm surges across much of the area were less than 10 feet, although Seabrook measured 12 feet.
The storm spawned 23 tornadoes, killed 21 people and destroyed 2,300 homes.
"Alicia was a marginal Category 3," Dodson said. "Its rainfall doesn't come close to this area's top 20 historical floods.
"I guess what I'm saying is that I hope people don't ignore evacuation warnings because they remember that things weren't apocalyptic during Alicia."